If you haven't already seen it (and you're a guy), check out cocksizecontest.com
It's basically what it says on the tin, and if you're into this kind of thing, it can be fun. To make beat/lose to people, especially if you have side bets on it.
Just thought it would be worth posting on here.

(If you get it, and you want to try me, my username on there is sibrowne)